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Warranty tracker for a battery pack

  • US 10,254,350 B2
  • Filed: 08/06/2015
  • Issued: 04/09/2019
  • Est. Priority Date: 08/06/2015
  • Status: Active Grant
First Claim
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1. A battery pack, comprising:

  • a plurality of battery modules, each battery module including a plurality of battery cells;

    a plurality of daisy-chained battery module controllers, each battery module controller mounted on a respective battery module of the plurality of battery modules;

    a battery pack controller coupled to the plurality of daisy-chained battery module controllers via a wire or cable to form a communication network;

    a memory device configured to store a cumulative warranty value representing cumulative battery usage of the battery pack; and

    a warranty tracker, implemented within the battery pack controller, configured to;

    periodically receive at least one of a voltage measurement and a temperature measurement from each of the plurality of daisy-chained battery module controllers for the respective battery module of the plurality of battery modules, and an electric current measurement indicating a rate of charge or discharge of the battery pack;

    normalize at least one of the voltage measurement and the temperature measurement from each of the plurality of daisy-chained battery module controllers based on a predefined conversion function to generate at least one of a voltage factor and a temperature factor for each of the plurality of daisy-chained battery module controllers;

    calculate a new warranty value representing usage of the battery pack for a period of time using at least the voltage factor or the temperature factor for each of the plurality of daisy-chained battery module controllers; and

    add the new warranty value to the cumulative warranty value stored in the memory device.

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